Forklift truck moving away:
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Low frequency running engine
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Power station turbine
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Welding transformer operation under load
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Gas welding
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The atmosphere of the factory, rattling
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Machine engine gaining momentum
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Welding, hammer knocking, Car factory
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Fluid drilling, Brewing unit
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Forklift approaching
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Spinning machine
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Automatic telephone switch
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Hydraulic pump
★★★★★